//: C21:NumStringGen.h
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// A random number generator that produces
// strings representing floating-point numbers
#ifndef NUMSTRINGGEN_H
#define NUMSTRINGGEN_H
#include <string>
#include <cstdlib>
#include <ctime>

class NumStringGen
{
    const int sz; // Number of digits to make
public:
    NumStringGen(int ssz = 5) : sz(ssz) {
        std::srand(std::time(0));
    }
    std::string operator()() {
        static char n[] = "0123456789";
        const int nsz = 10;
        std::string r(sz, ' ');
        for (int i = 0; i < sz; i++)
            if (i == sz/2)
                r[i] = '.'; // Insert a decimal point
            else
                r[i] = n[std::rand() % nsz];
        return r;
    }
};
#endif // NUMSTRINGGEN_H ///:~
